Metal-punching machine



(No Model.) 2 Sheets-Sheet 1. P. 13. MILES.

METAL PUNGHING MACHINE.

Patented Aug. 1, 1882.

[mWv/, am /a? 47% (No Model.) 2 Sheets--Sheet 2. F. B. MILES.

METAL PUNOHING MACHINE.

Patented Aug. 1, 1882;

3o ject to be punched rests, and between the end, i, of the connecting-rod F.

and having an eccentric or crank pin, h,which FREDERICK B. MILES, OF PHI METAL-PUNCH PATENT @FMCE.

LADELP [-1 IA, PENNSYLVANIA.

ING MACHINE.

SPECIFICATION forming part of Letters Patent No. 262,082, dated August 1, 1882. Application filed September 21, 1881. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK B. MILES, a citizen of the United States, residing in Philadelphia, Pennsylvania, have ill vented certain Improvements in Metal-Pullchin g Machines, of which the following is a specification.

My invention consists of a punching-machine constructed in the peculiar manner fully described hereinafter, for the purpose of enabling the operator to adjust the punches to a marked plate or other object to be perforated before the power of the machine is exerted to force the said punches through the metal.

In the accompanying drawings, Figure 1, Sheet 1, is a side view, partly ill section, of a portion of a punching-machine illustrating my invention; Fig. 2, a front view; Fig. 3, Sheet 2, a's ectional plan on the line] 2; and Figs. 4 and 5, perspective views, illustrating detached parts relating to my improvements.

The main frame A of the machine is recessed at a, as in other punching-machines, for receiving the plate or other object to be punched, and has vertical guides 12 b for the main slide B, which is shown in perspective in Fig. 4, and to the lower end of which is secured the punchca-rrier D, provided in the present instance with two punches, e e. The projecting portion 10 of the frame supports the dies on which the obpunches and the dies is the usual stripper,f.

E is the driving-shaft, adapted to suitable bearings in the upper portion of the main frame,

passes through and fits snugly in the upper Instead of hinging the lower end of this rod directly to the punch-carrying slide, as in other punchingmachines, it is connected to a block, G, the rod having a horizontal cylindrical end,j, so adapted to a recess, 70, in the block G that the latter can be moved to or fro on the said cylindrical end, which, however, is free to vibrate in the block, the latter having a vertical reciprocating movement commensurate with the eccentricity of the pin it ill respect to the drivlug-shaft.

It will be seen on referring to Figs. 1, 4., and 5 that the under side of the block consists of a series of steps, m, and that the bearin g for the blockwithin theslide also consists ofstepsn.

A lever, H, is pivoted to an extension, 0, of the frame A, one arm,p, of this lever being weighted and the other arm passing through an opening, q, ill an extension, 8, of the slide B, the tendency of which is to rise, owing to the said weighted arm 19 of the lever H.

The connecting-rod F is contained within an opening ill the slide of sufficient size to permil: the free lateral vibrating of the said rod and the free vertical movement to a limited extent of both rod and slide independently of each other, the opening ill the slide extending so far upward that when the said slide is at the limit of its downward movement the upper end of the connecting-rod, as it is operated,

will be clear of the upper end of the said opening.

The block G has at the rear a projection, t,

Fig. 5, into a vertical .slot, 13, in which projects a pin, a, Fig. 3, on an arm, V, secured to a shaft, K, which has its hearings in the frame of the machine. To this shaft is secured a lever, L, and an arm, M, connected by a rod, M, to one arm of a lever, N, which is pivoted to the frame, and the other arm ot'which is provided with a stirrup, P, the lever M, rod M, and part of the lever N being shown by dotted lines in Fig. 1.

It will be seen on referring to Figs. 1 and 4 that there are ill the slide two internal projections, 4; o, for the portions 3 y, Fig. 5, of the block G to bear against under the circumstances explainedhereinafter. hen thedriving-shat't is rotated and the block G is in the position shown ill Fig. 1 it will be reciprocated without imparting any motion to the punch-carrying slide B, as the steps of the block clear those of the slide, and as the upper end of the block is clear of the above-mentioned projections '12 v. The operator introduces the marked plate between the dies and the stripper-plate, and by means of the rod 00, suspended from the long arm of the lever H, lowers the slideB until the punches are in contact, or nearly so, with the plate, which the operator now adjusts so thatits marks coincide exactly with the said punches. Afterthis adjustment the operator, by manipulating the lever L or depressing the stirrup P with his foot, moves the block Gforward until its steps in are directly above the steps a in the slide and the upper portions, y

3 of the said block are beneath the projections v 1: of the said slide, which will now be de pressed by the eccentric pin h, the punches passing through the plate at the marked points. On the return or upward movement of the block it is retained in the last-mentioned position, so that the upper end of the said block, bearing againstthe internal projections, o 1), will raise the slide and strip the punches from the plate, and when this has been effected the block can be at once moved back to its first position, where it ceases to control the slide, the punches of which can be adjusted to other hole-marks in the plate prior to a repetition of the above-described operations.

It is not essential that the machine should he provided both with the lever L for operating the block G and with devices for operating it by the foot but both are generally furnished, so that the operator can select either of the two devices.

The arrangement of the under side of the block and the bearing for the samein steps is for the purpose of restricting the movement of the block without any diminution of its bearing-surface or that of the slide. A plain block without steps might be used; but this would demand an inconveniently-extended movement of the block if its bearing-surface should be as extended as circumstances re- .quire.

A plate, \V, Fig. 1, is secured to the slide-in front of the opening in the same, and serves to maintain the connecting-rod F in place, this plate being omitted in Fig. 2.

I claim as my invention---- 1. The combinatiomin a punching-machine, of a punch-carrying slide and mechanism for raising and lowering the same independently of the driving-shaft of the machine, with an ad j ustablereciprocatin gblocl(,G,operated from the driving-shaft, and with mechanism whereby the said block may be adjusted to the slide, so as to control the same, or from the slide, so as to free the same from the control of the said block, all substantially as set forth.

2. The combination of the connecting-rod I adapted at its upper end to the eccentric pin h of the shaftE, and terminating belowin a horizontal cylinder,j, with a block, G, adapted to and adjustable on the said cylinder, all sub stantially as set forth.

3. The combination of the vertically reciprocating and adjustable block G with a slide having bearings for the under side of the block and projections v o for the upper side of the said block, substantially as specified.

In testimony \vh ereot' I have signed my name to this specification in the presence of two subscribing witnesses.

FRIJDK. 13. MILES.

\Vitnesses:

HARRY DRURY, HARRY SMITH. 

